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CVE-2017-6920: PECL YAML parser unsafe object handling

August 6, 2018 (updated October 4, 2018)

PECL YAML parser does not handle PHP objects safely during certain operations within Drupal core. This can lead to remote code execution.

References

  • www.drupal.org/SA-CORE-2017-003

Code Behaviors & Features

Detect and mitigate CVE-2017-6920 with GitLab Dependency Scanning

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Affected versions

All versions before 8.3.4

Fixed versions

  • 8.3.4

Solution

Upgrade to version 8.3.4 or above.

Impact 9.8 CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Learn more about CVSS

Weakness

  • CWE-19

Source file

packagist/drupal/core/CVE-2017-6920.yml

Spotted a mistake? Edit the file on GitLab.

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